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Questions and Answers
What is the unit for potential difference?
What is the unit for potential difference?
A voltmeter must be connected in series to measure potential difference.
A voltmeter must be connected in series to measure potential difference.
False
What device is used to measure potential difference?
What device is used to measure potential difference?
Voltmeter
The difference in electric potential energy per unit charge is referred to as ______.
The difference in electric potential energy per unit charge is referred to as ______.
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Match the following terms with their definitions:
Match the following terms with their definitions:
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How does voltage relate to electrons?
How does voltage relate to electrons?
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Electrons return to the cell with higher potential energy than when they left.
Electrons return to the cell with higher potential energy than when they left.
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What happens to the voltage when it is measured across a load?
What happens to the voltage when it is measured across a load?
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The symbol for voltage is represented by the letter ______.
The symbol for voltage is represented by the letter ______.
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Study Notes
Potential Difference (Voltage)
- Potential difference, or voltage, is the difference in electric potential energy per unit charge measured at two points.
- The unit for voltage is V, and the symbol is V.
- Voltage can be seen as the energy each electron possesses, unlike current which is the amount of electrons.
- Voltage is analogous to the energy stored by water at the top of a waterfall, higher than the energy of the water that has fallen.
- Electrons lose potential energy when they pass through a load.
- The cell (or battery) replenishes the electrons' energy after they pass through a load.
Measuring Potential Difference
- A voltmeter is used to measure potential difference.
- Voltmeters are connected in parallel with a load or energy source.
- The symbol for a voltmeter is a "V" with a circle around it.
- Voltage is relative to two points, representing a drop in voltage across a load or energy source.
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Description
Explore the concept of potential difference, or voltage, and its significance in electricity. This quiz covers the definition, measurement, and analogy of voltage in electrical circuits, including the role of voltmeters. Test your knowledge on how voltage affects the flow of energy in a circuit!
